Alberta



(No Model.)

A. A.PAGB.

W TRANSOM LIP'I'ER. I

No. 396,953. Patented Jan. '29, 1889.-

Nirnn States Patent rricnw ALBERT A. PAGE, OF NEV HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF SAME PLAO'E.

TRNSOlVl-LIFTER.

SPECIFICATION forming part of Letters Patent No. 396,953, dated January 29, 1889.

Application filed September 17, 1888. Serial No. 285,581. (No model.)

To call wwm it may 00771087172:

Be it known that I, ALBERT APAGE, of New llaven, in the county of New Haven and State of Connecticut, have invented a new Iinprovement in rlh'ansom-Lifters5 and I do hereby declare the following, when taken in connection with accompanying drawings, and the letters of reference marked thereon,to be a full, clear, and exact description of the same,

Io 'and which said drawings constitute part of this specification, and represent in- Figure l, a side View of the transom-lifter as applied; Fig. 2, the outer end of the arm, showing' side view of the trunnion and end View of the projection therefrom Fig. 3, a top View of the same; Fig. 4:, a side View of the head for the rod; Fig. a Vertical section of the same. Fig. 6 illustrates the method of setting the head upon the trunnion, Fig. 7, a

5 face View of the guide, showing the set-screw;

Fig. 8, a Vertical section of the same, showing side View of the rod; Fig. 9, a transvcrse section of the same through the set-screw, all the figures, except 1 and 7, being full size.

This invention relates to an improvement in devices for Operating transoms over doors, and particularly to that class in which a Vertically-sliding` rod is arranged upon the jamb, combined with an arm hung to the transom and a connecting-rod from said arm to the said rod, so that the moveinent of the rod up or down opens or closes the transom, as the Case may be.

The object of the invention is to simplify 3 5 and cheapen the construction; and the invention consists in the construction, as hereina'fter described, and more particularly recited in the claim.

A represents the Operating-rod, which is ar- 40 ranged vertically in guides a co and so as to slide frcely up and down.

B represcnts the arm, which is attached to the transoin, and O the connecting-rod, which is hung by one end to the arm B and by the other end to the rod Abelow, so that the movement of the rod up or down will impart a corresponding opening and closing movement to the transom to which the arm is attached, this being a common and well-known class of tran- 5o so1n-lifters.

It is necessary that the connecting-rod O shall be hinged to the rod B, so as to make a firm joint, yet it is desirable that it should be so hinged as to be readilyremovable 'to facilitate the packing of the lifter or its application 5 5 or removal.

To make a detachable joint, and yet without employment of nuts, pins, or collars, to hold the rod in engagement with the arm, the arm B is constructe'd with the usual trunnion, D, at its outer end. (See Figs 2 and The length of the trunnions corresponds substantially to the width of the head E of the rod O. The head E may be made detachable from the rod in the usual inanner.

At the inner end of the trunnion D a collar, b, is formed on the arm integral therewith, as in the usual construction; but at the outer end of the trunnion a lateral proj ection,

(Z, is formed, which extends only at one side 7o of the trunnion, and is rounded upon the outer surface, as seen in Figs. 2 and The opening through the head is of a diameter. corresponding to the trunnion, but upon the lower or shank side of the opening and on the face of the head the metal is cut away to form a recess, e. This recess'may be upon both sidcs, as seen in Figs. 5 and (3. The position of this recess in the head is in relation to the proj ection d on the trunnion,' so that when the So parts are in place, as in Fig. l, the projection cl of the trunnion is at substantially right angles to the recess c of the head.

To apply the head to the trunnion, it is placed over the projection (Z of the trunnion by bringing the recess in the head into line therewith, as seen in Fig. G. The rounded outer surface of the projection permits 'the head then to be turned into a plane at right angles to the aXis of the trunnion, as represented in broken lines Fig. G, and then the head is turned upon the trunnion as an axis to take the recess e out of line with the projection (Z of the trunnion, and, as seen in Fig.

l, this then brings the head to a bearing on the trunnion, the projection serves as a stop to prevent this escape, and so long as it is retained with the recess in the head insthe relative position to the trunnion shown in Fig. 1' escape is impossible, and the head works mo 'the outside to bear upon the nut.

upon the trunnion as if held there by a collar or nut upon the outside.

The arml is cast complete with the proj ection cl, and the head is cast with its recess or recesses complete, so that no labor is required in the preparation of the parts for being' set together, and when set together are as firmly held as in the usual construction where some removable mechanical appliance is provided to hold the two parts removably together. By this construction of the eye and pivot the bearing between the eye and the pivot is of complete circular shape and unbroken, which gives to the pivot a smooth working-surface in contradistinction to the eye and pivot, as heretofore constructed, in which the pivot is formed with a projection on one sideand the eye with a corresponding recess in its bearing-surface through which the projection on the pivot may pass to interlock after the manner of what is called a bayonet-joint This broken surface unavoidably interferes with the proper working of the pivot-that is to say, the pivot cannot work in the eye with such broken surface as smoothly as in a surface not unbroken, as in-this application.

Inl a lifter of this Character it is desirable, if not necessary, that a looking device shall be provided which will hold the rod at any position to which it may be set in the opening or closing of the transom. To do this, a guide, F, has been fixed to the jamb through which the rod passes, and then a set-screw introduced into the guide from NVhile such construction serves a very good purpose, the screw is liable to be removed and lost, when the looking device becomes useless. To obviate this diffieulty and provide a locking device which cannot escape, I construct ,the guide of a sufficient depth to permit the set-screw f to be introduced from the inside before the guide is placed upon the jamb, and, as seen in Figs. 8 and 9, the screw is constructed with a head, G, which stands inside the guide, and between the front of the guide and the rod,as seen in Figs. 1 and 8, the sides of' the head projecting each. side the guide,

and as seen in Fig. 7, so that the fingers may be applied to the head to rotate the screw. Upon the inner end of the screw a saddle, H, is provided, which rests against the rod, and against 'which the screw may bear, as seen in Figs. 8 and 9. By turning the screw in one direction its force is brought to bear upon the rod, and turning in the oppo'site direction will release the rod, substantially the same as the usual set-screw; but because of the arrangement of the head of the screw upon the inside of the guide F the escape of the screw when once in place is impossible, and this is accomplished without adding to the expense of the structure.

I am aware that the trunnions and the e01'- responding head of the rod of transom-lifters have been constructed so as to interlock with each other when in operation to prevent the escape of the head from the trunnion, and therefore do not claim, broadly, such construction.

I claim In a transom-lifter consisting of a liftingrod, an arm attached to the transom, and a connecting-rod hung to said lifting-red and to the outer end of the said arm, the said arm constructed with a trunnion, D, projecting from a shoulder on the arm, and the trunnion constructed with a lateral proj ection, d, upon one side, distant from said shoulder corresponding to the thickness of the head of the rod, with the head of the rod constructed with an op enin g through it corresponding in diameter to the said trunnion, the face of the head recessed from its opening ontward to a point out of line with the said projection (Z on the trunnion when the two parts are set together, substantially as specified, and whereby because of said recess in thehead and the said lateral projection ou the trunnion the said head may be removably set onto the trunnion over said projection.

A. A. PAGE.

Vitnesses:

WM. S. CooKE, AUKER S. LYHNE. 

